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/**
* @file llspellcheck.cpp
* @brief Spell checking functionality
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "lldir.h"
#include "llsdserialize.h"
#include "llspellcheck.h"
#if LL_WINDOWS
#include <hunspell/hunspelldll.h>
#pragma comment(lib, "libhunspell.lib")
#else
#include <hunspell/hunspell.hxx>
#endif
static const std::string DICT_DIR = "dictionaries";
static const std::string DICT_CUSTOM_SUFFIX = "_custom";
static const std::string DICT_IGNORE_SUFFIX = "_ignore";
LLSpellChecker::settings_change_signal_t LLSpellChecker::sSettingsChangeSignal;
LLSpellChecker::LLSpellChecker()
: mHunspell(NULL)
{
// Load initial dictionary information
refreshDictionaryMap();
}
LLSpellChecker::~LLSpellChecker()
{
delete mHunspell;
}
bool LLSpellChecker::checkSpelling(const std::string& word) const
{
if ( (!mHunspell) || (word.length() < 3) || (0 != mHunspell->spell(word.c_str())) )
{
return true;
}
if (mIgnoreList.size() > 0)
{
std::string word_lower(word);
LLStringUtil::toLower(word_lower);
return (mIgnoreList.end() != std::find(mIgnoreList.begin(), mIgnoreList.end(), word_lower));
}
return false;
}
S32 LLSpellChecker::getSuggestions(const std::string& word, std::vector<std::string>& suggestions) const
{
suggestions.clear();
if ( (!mHunspell) || (word.length() < 3) )
return 0;
char** suggestion_list; int suggestion_cnt = 0;
if ( (suggestion_cnt = mHunspell->suggest(&suggestion_list, word.c_str())) != 0 )
{
for (int suggestion_index = 0; suggestion_index < suggestion_cnt; suggestion_index++)
suggestions.push_back(suggestion_list[suggestion_index]);
mHunspell->free_list(&suggestion_list, suggestion_cnt);
}
return suggestions.size();
}
const LLSD LLSpellChecker::getDictionaryData(const std::string& dict_name) const
{
for (LLSD::array_const_iterator it = mDictMap.beginArray(); it != mDictMap.endArray(); ++it)
{
const LLSD& dict_entry = *it;
if (dict_name == dict_entry["language"].asString())
return dict_entry;
}
return LLSD();
}
void LLSpellChecker::refreshDictionaryMap()
{
const std::string app_path = getDictionaryAppPath();
const std::string user_path = getDictionaryUserPath();
// Load dictionary information (file name, friendly name, ...)
llifstream user_map(user_path + "dictionaries.xml", std::ios::binary);
if ( (!user_map.is_open()) || (0 == LLSDSerialize::fromXMLDocument(mDictMap, user_map)) || (0 == mDictMap.size()) )
{
llifstream app_map(app_path + "dictionaries.xml", std::ios::binary);
if ( (!app_map.is_open()) || (0 == LLSDSerialize::fromXMLDocument(mDictMap, app_map)) || (0 == mDictMap.size()) )
return;
}
// Look for installed dictionaries
std::string tmp_app_path, tmp_user_path;
for (LLSD::array_iterator it = mDictMap.beginArray(); it != mDictMap.endArray(); ++it)
{
LLSD& sdDict = *it;
tmp_app_path = (sdDict.has("name")) ? app_path + sdDict["name"].asString() : LLStringUtil::null;
tmp_user_path = (sdDict.has("name")) ? user_path + sdDict["name"].asString() : LLStringUtil::null;
sdDict["installed"] =
(!tmp_app_path.empty()) &&
( ((gDirUtilp->fileExists(tmp_user_path + ".aff")) && (gDirUtilp->fileExists(tmp_user_path + ".dic"))) ||
((gDirUtilp->fileExists(tmp_app_path + ".aff")) && (gDirUtilp->fileExists(tmp_app_path + ".dic"))) );
sdDict["has_custom"] = (!tmp_user_path.empty()) && (gDirUtilp->fileExists(tmp_user_path + DICT_CUSTOM_SUFFIX + ".dic"));
sdDict["has_ignore"] = (!tmp_user_path.empty()) && (gDirUtilp->fileExists(tmp_user_path + DICT_IGNORE_SUFFIX + ".dic"));
}
}
void LLSpellChecker::addToCustomDictionary(const std::string& word)
{
if (mHunspell)
{
mHunspell->add(word.c_str());
}
addToDictFile(getDictionaryUserPath() + mDictFile + DICT_CUSTOM_SUFFIX + ".dic", word);
sSettingsChangeSignal();
}
void LLSpellChecker::addToIgnoreList(const std::string& word)
{
std::string word_lower(word);
LLStringUtil::toLower(word_lower);
if (mIgnoreList.end() != std::find(mIgnoreList.begin(), mIgnoreList.end(), word_lower))
{
mIgnoreList.push_back(word_lower);
addToDictFile(getDictionaryUserPath() + mDictFile + DICT_IGNORE_SUFFIX + ".dic", word_lower);
sSettingsChangeSignal();
}
}
void LLSpellChecker::addToDictFile(const std::string& dict_path, const std::string& word)
{
std::vector<std::string> word_list;
if (gDirUtilp->fileExists(dict_path))
{
llifstream file_in(dict_path, std::ios::in);
if (file_in.is_open())
{
std::string word; int line_num = 0;
while (getline(file_in, word))
{
// Skip over the first line since that's just a line count
if (0 != line_num)
word_list.push_back(word);
line_num++;
}
}
else
{
// TODO: show error message?
return;
}
}
word_list.push_back(word);
llofstream file_out(dict_path, std::ios::out | std::ios::trunc);
if (file_out.is_open())
{
file_out << word_list.size() << std::endl;
for (std::vector<std::string>::const_iterator itWord = word_list.begin(); itWord != word_list.end(); ++itWord)
file_out << *itWord << std::endl;
file_out.close();
}
}
void LLSpellChecker::setSecondaryDictionaries(std::list<std::string> dict_list)
{
if (!getUseSpellCheck())
{
return;
}
// Check if we're only adding secondary dictionaries, or removing them
std::list<std::string> dict_add(llmax(dict_list.size(), mDictSecondary.size())), dict_rem(llmax(dict_list.size(), mDictSecondary.size()));
dict_list.sort();
mDictSecondary.sort();
std::list<std::string>::iterator end_added = std::set_difference(dict_list.begin(), dict_list.end(), mDictSecondary.begin(), mDictSecondary.end(), dict_add.begin());
std::list<std::string>::iterator end_removed = std::set_difference(mDictSecondary.begin(), mDictSecondary.end(), dict_list.begin(), dict_list.end(), dict_rem.begin());
if (end_removed != dict_rem.begin()) // We can't remove secondary dictionaries so we need to recreate the Hunspell instance
{
mDictSecondary = dict_list;
std::string dict_name = mDictName;
initHunspell(dict_name);
}
else if (end_added != dict_add.begin()) // Add the new secondary dictionaries one by one
{
const std::string app_path = getDictionaryAppPath();
const std::string user_path = getDictionaryUserPath();
for (std::list<std::string>::const_iterator it_added = dict_add.begin(); it_added != end_added; ++it_added)
{
const LLSD dict_entry = getDictionaryData(*it_added);
if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) )
continue;
const std::string strFileDic = dict_entry["name"].asString() + ".dic";
if (gDirUtilp->fileExists(user_path + strFileDic))
mHunspell->add_dic((user_path + strFileDic).c_str());
else if (gDirUtilp->fileExists(app_path + strFileDic))
mHunspell->add_dic((app_path + strFileDic).c_str());
}
mDictSecondary = dict_list;
sSettingsChangeSignal();
}
}
void LLSpellChecker::initHunspell(const std::string& dict_name)
{
if (mHunspell)
{
delete mHunspell;
mHunspell = NULL;
mDictName.clear();
mDictFile.clear();
mIgnoreList.clear();
}
const LLSD dict_entry = (!dict_name.empty()) ? getDictionaryData(dict_name) : LLSD();
if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) )
{
sSettingsChangeSignal();
return;
}
const std::string app_path = getDictionaryAppPath();
const std::string user_path = getDictionaryUserPath();
if (dict_entry.has("name"))
{
const std::string filename_aff = dict_entry["name"].asString() + ".aff";
const std::string filename_dic = dict_entry["name"].asString() + ".dic";
if ( (gDirUtilp->fileExists(user_path + filename_aff)) && (gDirUtilp->fileExists(user_path + filename_dic)) )
mHunspell = new Hunspell((user_path + filename_aff).c_str(), (user_path + filename_dic).c_str());
else if ( (gDirUtilp->fileExists(app_path + filename_aff)) && (gDirUtilp->fileExists(app_path + filename_dic)) )
mHunspell = new Hunspell((app_path + filename_aff).c_str(), (app_path + filename_dic).c_str());
if (!mHunspell)
return;
mDictName = dict_name;
mDictFile = dict_entry["name"].asString();
if (dict_entry["has_custom"].asBoolean())
{
const std::string filename_dic = user_path + mDictFile + DICT_CUSTOM_SUFFIX + ".dic";
mHunspell->add_dic(filename_dic.c_str());
}
if (dict_entry["has_ignore"].asBoolean())
{
llifstream file_in(user_path + mDictFile + DICT_IGNORE_SUFFIX + ".dic", std::ios::in);
if (file_in.is_open())
{
std::string word; int idxLine = 0;
while (getline(file_in, word))
{
// Skip over the first line since that's just a line count
if (0 != idxLine)
{
LLStringUtil::toLower(word);
mIgnoreList.push_back(word);
}
idxLine++;
}
}
}
for (std::list<std::string>::const_iterator it = mDictSecondary.begin(); it != mDictSecondary.end(); ++it)
{
const LLSD dict_entry = getDictionaryData(*it);
if ( (!dict_entry.isDefined()) || (!dict_entry["installed"].asBoolean()) )
continue;
const std::string filename_dic = dict_entry["name"].asString() + ".dic";
if (gDirUtilp->fileExists(user_path + filename_dic))
mHunspell->add_dic((user_path + filename_dic).c_str());
else if (gDirUtilp->fileExists(app_path + filename_dic))
mHunspell->add_dic((app_path + filename_dic).c_str());
}
}
sSettingsChangeSignal();
}
// static
const std::string LLSpellChecker::getDictionaryAppPath()
{
std::string dict_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, DICT_DIR, "");
return dict_path;
}
// static
const std::string LLSpellChecker::getDictionaryUserPath()
{
std::string dict_path = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, DICT_DIR, "");
if (!gDirUtilp->fileExists(dict_path))
{
LLFile::mkdir(dict_path);
}
return dict_path;
}
// static
bool LLSpellChecker::getUseSpellCheck()
{
return (LLSpellChecker::instanceExists()) && (LLSpellChecker::instance().mHunspell);
}
// static
boost::signals2::connection LLSpellChecker::setSettingsChangeCallback(const settings_change_signal_t::slot_type& cb)
{
return sSettingsChangeSignal.connect(cb);
}
// static
void LLSpellChecker::setUseSpellCheck(const std::string& dict_name)
{
if ( (((dict_name.empty()) && (getUseSpellCheck())) || (!dict_name.empty())) &&
(LLSpellChecker::instance().mDictName != dict_name) )
{
LLSpellChecker::instance().initHunspell(dict_name);
}
}
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